Any online light bulb retailer will sell them. You can get them on Amazon as well. Just google "rough service incandescent light bulbs" and you will find them. They are expensive (IIRC around $7 a bulb) but they are rated to last 10,000 hours, which at 12 hours use a day is over 2 years, and in my experience they do hit that lifespan. They also sell 20,000 hour bulbs as well, I have not personally tried them
You can also buy 40W and 60W chandelier bulbs with the standard size base, they are identical to the old standard A19 bulb in every way, except instead of being shaped like a round globe, it is shaped like an oblong candle flame shape.
I can still find 60W incandescent flood lights at my local Target, who knows how long that will last though. I would suggest when you find a bulb that works for you, stock up on a lifetime supply. Better to spend a few hundred now and be set for life than risk some overzealous administration outright banning all incandescent bulbs at some point in the future. They have been a (pointless) target of environmental zealots for year and since the vast majority of people just don't care because it doesn't effect them, it's something that could easily be slipped by and leave us high and dry.